string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=1919%E5%B9%B4%E7%AD%BE%E8%AE%A2%E4%BA%86%E4%BB%80%E4%B9%88%E4%B8%8D%E5%B9%B3%E7%AD%89%E6%9D%A1%E7%BA%A6 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
1919年签订了什么不平等条约
